Abstract
We show that the group-velocity-led optical event horizon (OEH) in optical fibers provides a convenient way to actively control the propagation property of higher-order solitons by a comparatively weak dispersive wave (DW) pulse. It has been found numerically that clean soliton breakup, a process by which a second-order soliton completely splits into a pair of constituent solitons with vastly different power proportions after interacting with the weak DW pulse, will occur while external DWs become polychromatic. The temporal separation between both constituent solitons can be controlled by adjusting the power of the external DW. The more energetic main soliton is advanced/trailed in time depending on the selected frequency of input DW pulse. We have developed an analytic formalism describing the external acting-force (AF) perturbation. These results provide a fundamental explanation and physical scaling of optical pulse evolution in optical fibers and can find applications in improved supercontinuum sources.
Highlights
Solitons are localized nonlinear waves formed by a balance between spreading and focusing effects in many different physical systems including nonlinear fiber-optics [1, 2], plasmas physics [3, 4] and Bose-Einstein condensates [5]
We show that the group-velocity-led optical event horizon (OEH) in optical fibers provides a convenient way to actively control the propagation property of higher-order solitons by a comparatively weak dispersive wave (DW) pulse
In order to fully understand the manipulation of soliton fission induced by external DW pulse, we find that the dynamic process of the 2-soliton splitting into a pair of fundamental constituent solitons can be investigated by adjusting the peak power of injected DW pulse
Summary
Solitons are localized nonlinear waves formed by a balance between spreading and focusing effects in many different physical systems including nonlinear fiber-optics [1, 2], plasmas physics [3, 4] and Bose-Einstein condensates [5]. One important property is soliton fission, a process where an energetic higher-order soliton breaks apart due to a sufficiently strong dispersive or nonlinear perturbation to the system [7]. The interactions between solitons and dispersive wave (DW) in optical waveguides [14, 15], one of the key physical mechanisms underlying the ultra-broadband supercontinuum generation [16, 17], are widely investigated in recent years. They have been proposed as a candidate to all-optical switching [18] and photonic transistor [19] owing to a close analogy with the event horizon in black holes. Note that central wavelengths of the 2-soliton ( sol ) and the DW packet ( DW ) are selected to fall on either side of the ZDW where the GVD is negative for the 2-soliton and positive for the DW pulse [14]
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